I have a similar problem on my '03 TJ. I have a aftermarket powered rearview mirror connected to the rear wiper fuse and it cuts out on me. When I turn the jeep off then on again it usually fixes the problem. I need to check the cigarette lighter though. I also have my heater/ ac fan cut out on me at randome times too. Turning it off and on helps, but doesn't fix the problem. No bad fuses. Let me know if you find anything out.